(单选题). 《分析实验室用水规格和试验方法》将实验室用水分为三个等级,各级别25℃电导率为( )。
A.一级水≤0.1μS /cm;二级水 ≤1.0μS /cm;三级水≤5.0μS/cm B.一级水≤0.01μS/cm;二级水≤0.1uS/cm;三级水≤0.5μS/cm C.一级水≤5.0μS/cm;二级水 ≤1.0μS /cm;三级水≤0.1μS/cm D.一级水≤0.01μS /cm;二级水≤0.1μS/cm;三级水≤1.0μS/cm正确答案B
(单选题). 《分析实验室用水规格和试验方法》将实验室用水分为三个等级,各级别25℃电导率为( )。
A.一级水≤0.1μS /cm;二级水 ≤1.0μS /cm;三级水≤5.0μS/cm B.一级水≤0.01μS/cm;二级水≤0.1uS/cm;三级水≤0.5μS/cm C.一级水≤5.0μS/cm;二级水 ≤1.0μS /cm;三级水≤0.1μS/cm D.一级水≤0.01μS /cm;二级水≤0.1μS/cm;三级水≤1.0μS/cm正确答案B
